Lock.



L. STERN.

V7 LOCK.

APPLICATION FILED OCT. 2|. 1916- 1,215,8n Patented Feb. 13,1917.

2 SHEETS-SHEET I.

L. STERN.

LOCK.-

APPLICATION FILED OCT. 21, I916.

1,215,8&

Patented.

' E @TATE% @lEFlGE.

LOUIE STERN, OF NEW YORK, N. Y.

LOCK.

Specification of Letters Patent.

Patented Feb. as, set a.

Application filed October 21, 1916. Serial No. 1.233%.

I '0 all whom it may concern:

Be it known that I, LOUIE STERN, a citizen of the United States, and a resident of New York city, in the county and State of Xew York, have invented certain new and use- Briefly stated, the invention comprises a lock having a pair of axially alined upright bolts that may be moved simultaneously in opposite directions and are adapted to engage opposite sides of a keeper. The invention further comprises means for locking the bolts against movement, common means for operating a latch either alone or in conjunction with the bolts, and various other t'eatures of novelty more fully pointed out in the specification and appended claims.

In the accompanying drawings:

Figure l, is a longitudinal section of a lock embodying my invention on line 11 F ig. 2; i

Fig. 2, a face View partly in section with the lock plate removed;

Fig. 3, a similar view showing the parts in a different position;

Fig. 4, a cross section on line H Fig. 1

Fig. 5, a cross section on line Fig.

Fig. 6, a perspective view of the two bolts Fig. 7, a perspective view of the forked lever and cooperating catch and Fig. 8, a rear view of the catch.

The lock case 1 is adapted to be secured by screws 2 to the inner side of a door or similar device 3. .Case -1 is furnished at the end facing the jamb 4, with upper and lower extensions 5, adapted to straddle the keeper 6, which is attached to jamb l by screw 7. Extensions 5, are provided with axially alined bores, which With door locks are arranged vertically one above the other. These bores accommodate a air of opposed or axially alined bolts 8, tiat are adapted to be simultaneously moved inward or into engagement with the keeper, or outward so as to clear the latter and become housed within extensions Bolts 8, are by cross pieces 9 connected to a pair of shanks 10. in such a manner that each bolt is arranged in substantial parallelism with its shank and that the bolts project inwardly from the cross pieces and face each other with their free or operative ends (Fig. 6). lVithin' casing 1, there is provided, a fixed rail or projection 11 that spaces shanks 10, and forms a guide therebetween along which said shanks are slidablesimultaneously in opposite direcv tions. To rail 11 there is pivoted at 12, a lever or oscillable member 13, having a pair of pins 14, that engage elongated slots 15 of. shanks 10; Lover 13 is provided at one end with a forked head 16, which is undercut or slotted sidewise as at 17 (Fig. 7). Head 16, is adapted to be operatively engaged by either one of a pair of pins 18,

mounted on opposite ends of an arm or rotatable member 19, fast on the spindle 20, of the manually operable knob '21 that projects from the inner side of the door. Pins 18 are also adapted to engage the arched cross bar 22 of a yoke comprising a pair. of axially slidable shafts 23, to which a plat '24 carrying the latch tongue 25 is secured. such tongue being centered between bolts 8 and movable at right angles thereto. Shafts 23, are encompassed by springs abutting at one of their ends against fixed stops 27 of lock case 1, said springs having a tendency to advance the latch and thus draw cross bar 22 into operative engagement with pins 18. during all positions of arm 19.

To a post 28, of lock case 1, is pivoted a hook-shaped catch '29 adapted to enter slot 17 and by grasping fork 1(3, lock lever 13 and consequently hold shanks 10 against movement. Catch 29 is provided with a shoulder 30, engaged by a cam edge 31 formed on one of the shanks 1t). and against which the catch is drawn by a spring 32.

.\t the outer side of tire door, there is provided, the usual key operated barrel 33 haV-. ing a blade 31, that projects into a slotted stud 35, rotatably fitted in the lock plate 36. This stud carries an arm 37 which is a substantial counterpart of arm 19. but .has a single pin 38 only in lieu of the two pins 18 carried by arm 19.

Keeper 6. is provided with a vertical bore 39 adapted to receive at its opposite ends, bolts 8, andwith an intermediate slot 40 adapted to receive latch 25.

It the bolts are retracted and it is desired to operate the latch alone, arm 19 is by knob 21, turned in either direction. to such an extent only, that cross bar 22 is by either one of the pin-s18, d awn inward to an extent sufficient to retract latch 33 against action of springs 26.

If it is desired to shoot bolts 8 arm this by knob :21 turned to such an extent that one of its pins 18, will enter forked head it and swing lever 13 on its pivot 11'. into its terminal position, (Fig. 2). The further rota tion of the knob will serve to withdraw the active pin 16 out of forked head it and to engage cross bar 12; so as to retract latch 25 in manner previously described. ts lever 13 is being turned it will by pins l-l, slide shanks 10 in opposite directions toward each other, so as to impart a corresponding movement to bolts H. nd cause the latter to enter bores 35) ot keeper ti trout opposite sides. During this sliding movement of shanks i the receding section ol' rain 31 will be gradually brought into engagement with shoulder 50. so that catch iil will, by its spring 32. be thrown up through slot 17, into engagement with l'orked head It) and thus lock the bolts against movement.

.When it is desired to retract the bolts, arm 10 is by knob it turned in the opposite direction whereby pin 18. will reenter head l i, .and during the lirst part ot' its movement, push catch 29 (which had projected a distance into the head) out of the 'i'ork'. The further turning otknob it. will cause lever 13 by its pins ll, to sliile sllanks 10 in opposite directions away from each other, so as t9 impart a correspoiuling movement to bolts 8, and cause the latter to clear the bores 39 of keeper (3.

During this sliding movement of shanks 10. the salient section lcam 31 will be gradually brought into engagement with shoulder 3t), so that catch ill will. against the action o'l its spring 32. be retracted or swung down (Fig. J.

As the turning of knob 21 is continued. pin 18 will laiv torked head i aml by engaging cross bar will operate the latch.

Then the lock is operated iron] the oi|tside by means ot a key. the operation is the same as above described. However. a single pin 38 on the operating arm 37, will now sutlice, for the reason that the latter must alway be'givcn such an extensive turn as will operate lever l3 and thus either advance or retract the bolts.

It will be seen that. a lock constructed as described. cannot be opened by forcing the, door or door jainb. tor the reason that as the bolts project into the keeper from opposite directions such forcing cannot release the lock from the keeper. So also the knob or the key serves to not only operate the latch lint also the latch. conjointly with the bolts, whereby simplicity in manipulation is ef tt'ected.

Finally, the lock is of simple construction and may be readily asselnbied, inspected or repaired.

I claim:

1. A lock comprising a case, a pair of inclosed parallel axially slidable shanks. a pair ot' inwardly directed bolts carried by the shanks and arranged in parallelism therenith. nit-ans l'or siniultaneouslv sliding said shanks in opposite directions and an apertured keeper adapted to be straddled by the case and to be engaged by the bolts.

2. .v. lock comprising a casta a pair ol' in closed parallel axially slidable shanks, a pair ol' inwardly directed bolts carried by the shanks and arranged in parallelism therewith. a lever engaging the shanks, a pivoted arm adapted to operatively engage said lever. and an apertured keeper adapted to be straddled by the ase and to be engaged by the bolts.

l. lock comprising a case. a pair of ini-losed parallel axially slidable shanks. a pair oi inwardly directed bolts carried by the shanlt's and arranged in parallelism therewitln a lever engaging the shanks. a pivoted arm adapted to operatively engage said lever. a yoke engaging said arm, a latch carried by the yoke, and an apertured keeper adapted to be straddled by the case and to be engaged by the bolts.

l. lock comprising a case, a pair ol op posed bolts having slidable shanks and inwardly directed l'ree ends. a forked lever operatively connected to said shanks. a pivoted arin having a pin adapted to engage said lever. a yoke engaging said arm, and a latch carried by the yoke.

ii. lock comprising a case. a pair ol' opposed bolts having slidable shanks. a Forked lever operatively connected to said shanks, a catch adapted lo lock the forked lever. a cam on one ol the bolt-shanks adapted to engage the catch. a pivoted arm adapted to engage the l'orked lever, a yoke that is engaged by the pivoted arm. and a latch carried by the yoke.

Lt )UIE i TE RN 

